66893741 has 4 divisors (see below), whose sum is σ = 66954432. Its totient is φ = 66833052.

The previous prime is 66893731. The next prime is 66893747. The reversal of 66893741 is 14739866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66893741 - 2¹⁴ = 66877357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66893692 and 66893701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66893747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28661 + ... + 30906.

It is an arithmetic number, because the mean of its divisors is an integer number (16738608).

Almost surely, 2^66893741 is an apocalyptic number.

It is an amenable number.

66893741 is a deficient number, since it is larger than the sum of its proper divisors (60691).

66893741 is a wasteful number, since it uses less digits than its factorization.

66893741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60690.

The product of its digits is 217728, while the sum is 44.

The square root of 66893741 is about 8178.8593948056. The cubic root of 66893741 is about 405.9399819877.

The spelling of 66893741 in words is "sixty-six million, eight hundred ninety-three thousand, seven hundred forty-one".